add tool to dump sched_trace fiels

1 files changed, 67 insertions, 0 deletions

diff --git a/bin/showst.c b/bin/showst.c
new file mode 100644
index 0000000..1580adf
--- /dev/null
+++ b/bin/showst.c
@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "sched_trace.h"
+
+static int map_file(const char* filename, void **addr, size_t *size)
+{
+        struct stat info;
+        int error = 0;
+        int fd;
+
+        error = stat(filename, &info);
+        if (!error) {
+                *size = info.st_size;
+                if (info.st_size > 0) {
+                        fd = open(filename, O_RDONLY);
+                        if (fd >= 0) {
+                                *addr = mmap(NULL, *size,
+                                             PROT_READ | PROT_WRITE,
+                                             MAP_PRIVATE, fd, 0);
+                                if (*addr == MAP_FAILED)
+                                        error = -1;
+                                close(fd);
+                        } else
+                                error = fd;
+                } else
+                        *addr = NULL;
+        }
+        return error;
+}
+
+static int map_trace(const char *name, void **start, void **end, size_t *size)
+{
+        int ret;
+
+        ret = map_file(name, start, size);
+        if (!ret)
+                *end = *start + *size;
+        return ret;
+}
+
+
+static void show(char* file)
+{
+        size_t s;
+        struct st_event_record *rec, *end;
+        unsigned int count;
+        if (map_trace(file, &rec, &end, &s) == 0) {
+                print_all(rec, 
+                          ((unsigned int)((char*) end - (char*) rec)) 
+                          / sizeof(struct st_event_record));
+        } else
+                perror("mmap");
+}
+
+int main(int argc, char** argv)
+{
+        int i;
+        for (i = 1; i < argc; i++)
+                show(argv[i]);
+        return 0;
+}